Added check for already-downloaded subjects
Added check for already-downloaded subjects

danlurie/C-PAC,danlurie/C-PAC,roijo/C-PAC_complexitytools,roijo/C-PAC_complexitytools,roijo/C-PAC_complexitytools,danlurie/C-PAC,danlurie/C-PAC,roijo/C-PAC_complexitytools